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Preparation method of battery-grade manganese sulfate

A manganese sulfate, battery-grade technology, applied in the field of preparation of battery-grade manganese sulfate, can solve the problems of corrosion, many processes, and high energy consumption, and achieve the effects of improving quality, reducing requirements, saving energy and auxiliary materials

Active Publication Date: 2017-03-22
JILIN JIEN NICKEL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the deficiencies and defects of the prior art, the present invention provides a method for preparing battery-grade manganese sulfate, which can overcome the traditional method of many procedures, high energy consumption and the introduction of highly corrosive fluoride ions Technical problems such as corrosion of equipment reduce the requirements for equipment and improve product quality

Method used

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  • Preparation method of battery-grade manganese sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1. Select pre-extraction solution

[0020] Use manganese sulfate solution as the pre-extraction liquid, adjust the pH value of the pre-extraction liquid to be 1.5, wherein the element content in the pre-extraction liquid is: Ni: 0.01g / L, Mn: 113g / L, Zn: 0.3g / L, Cu: 0.66g / L, Ca:0.39g / L, Mg:0.005g / L;

[0021] Step 2, saponification of extractant octadecanoic acid

[0022] Octydecanoic acid adds the sodium hydroxide of 400g / L to the octadecanoic acid that volume concentration is 30% and carries out saponification, and saponification rate is controlled at 54%;

[0023] Step 3. Extraction

[0024] Use a pump to pump the pre-extraction liquid and the saponified octadecanoic acid into the extraction box to mix, and the extraction reaction occurs. The extraction temperature is 30°C to 50°C, and the extraction ratio is 5:1. Turn on the stirring paddle and control the speed of the stirring paddle at 260 rpm;

[0025] Step 4. Washing

[0026] After the extraction is comp...

Embodiment 2

[0031] Step 1. Select pre-extraction solution

[0032] Use manganese sulfate solution as the pre-extraction liquid, adjust the pH value of the pre-extraction liquid to be 1.72, wherein the element content in the pre-extraction liquid is: Ni: 0.03g / L, Mn: 120g / L, Zn: 0.55g / L, Cu: 2.5g / L, Ca:0.44g / L, Mg:0.008g / L;

[0033] Step 2, saponification of extractant octadecanoic acid

[0034] Be that the sodium hydroxide of 400g / L is added in the octadecanoic acid that volume concentration is 10% carries out saponification, and saponification rate is controlled at 45%;

[0035] Step 3. Extraction

[0036] Pump the pre-extraction liquid and the saponified octadecanoic acid into the extraction box for mixed extraction. The extraction temperature is 30°C-50°C, the extraction ratio is 5.5:1, and the stirring paddle is turned on. The speed of the stirring paddle is controlled at 100 rpm ;

[0037] Step 4. Washing

[0038] After the extraction is completed, pump 20g / L sulfuric acid into ...

Embodiment 3

[0043] Step 1. Select pre-extraction solution

[0044] Use manganese sulfate solution as the pre-extraction liquid, adjust the pH value of the pre-extraction liquid to be 1.0, wherein the element content in the pre-extraction liquid is: Ni:0.04g / L, Mn:115g / L, Zn:0.38g / L, Cu: 3.0g / L, Ca:0.38g / L, Mg:0.008g / L;

[0045] Step 2, saponification of extractant octadecanoic acid

[0046] Add the sodium hydroxide of 400g / L to carry out saponification in the octadecanoic acid that volume concentration is 20%, saponification rate is controlled at 50%;

[0047] Step 3. Extraction

[0048] Pump the pre-extraction liquid and the saponified octadecanoic acid into the extraction box for mixed extraction. The extraction temperature is 30°C-50°C, the extraction ratio is 6:1, the stirring paddle is turned on, and the speed of the stirring paddle is controlled at 300 rpm ;

[0049] Step 4. Extract organic washing

[0050]After the extraction is completed, pump 20g / L sulfuric acid into the ext...

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Abstract

The invention provides a preparation method of battery-grade manganese sulfate and belongs to the technical field of hydrometallurgy. The method comprises steps as follows: step one, a manganese sulfate solution is taken as a pre-extraction solution; step two, 400 g / L of sodium hydroxide is added to octocapric acid for saponification; step three, the pre-extraction solution and octocapric acid after saponification are subjected to mixed extraction; step four, 20 g / L of sulfuric acid is pumped into an extraction box to be contacted with an extracted organic phase for the extraction reaction; step five, the extracted organic phase containing manganese ions is subjected to reverse extraction with 20 g / L of sulfuric acid; step six, battery-grade manganese sulfate is obtained. According to the method, the manganese sulfate solution with higher impurity content is enabled to enter an extraction system and the purpose of removing impurities is achieved by extraction, washing and reverse extraction of the solution; the overall technological process avoids chemical purification, chemical calcium removal and chemical magnesium removal processes, so that energy and auxiliary materials are saved, besides, no negative ions such as fluoride ions are introduced, and the requirement for equipment is reduced.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, in particular to a method for preparing battery-grade manganese sulfate. Background technique [0002] At present, the production methods of battery-grade manganese sulfate are mainly chemical purification and extraction methods. Now chemical methods involve calcium and magnesium removal processes, which have high energy consumption and the introduction of highly corrosive fluorine ions, which have a greater impact on equipment. The extraction method generally uses P204 for full extraction. Before the extraction, chemical purification is also required to remove calcium and magnesium. There are also technical problems such as high energy consumption and the introduction of highly corrosive fluorine ions, which have a great impact on equipment, and the battery-grade manganese sulfate produced High fluorine content reduces product quality. [0003] Therefore, a new technical solution is bad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/003C01G45/10
Inventor 张东闻松孟庆伟于睿
Owner JILIN JIEN NICKEL IND
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